Although I sometimes forget about supplementing my vegan diet with vitamin B12, it's always important to remember to do so. As mentioned is this previous post, this vitamin supports brain function and the nervous system. However, in the recent study from Sweden at the University of Gothenburg (in partnership with the NIH) which studied 1,000 men, it was found that older men with lower levels of B12 were more at risk for bone fractures. Although only the men with serious deficiencies of B12 were to be treated, the main recommendation to prevent bone density loss was to get plenty of exercise, an activity that seems to improve bone strength over time. Vegans can supplement B12 in their diets with nutritional yeast, fortified non-dairy milk, vegan yogurt, and some tofu products.